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  1. Prepare
  2. Mathematics
  3. Fundamentals
  4. Is Fibo
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Is Fibo

  • steven85
     + 0 comments

    Solution in Swift only storing the last two items in the array to calculate the new value

    func isFibo(n: Int) -> String {
    var nums = [0,1]
    while nums[1] < n {
        nums.swapAt(0, 1)
        nums[1] = nums.reduce(0, +)
    }
    
    return nums[1] == n ? "IsFibo" : "IsNotFibo"
}